Chapter 55-25.1.4 Control System Configuration 0017-2648iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018iThe laser exposure system is controlled mainly by the IC5 on the DC controller PCB.Main control types are as follows:[1] Laser emission ON/OFF control/video signal input[2] Horizontal synchronization control[3] Laser scanner motor control[4] Automatic photocurrent control (APC)F-5-25.2 Various Controls5.2.1 Controlling the Laser Activation Timing5.2.1.1 Laser Emission ON/OFF Control 0017-3094iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018iThe purpose of this control is to turn ON/OFF the laser diode (LD) in response to video signals.The DC controller PCB sends laser control signals (CNTRL0, CNTRL1, and CNTRL2), which are used to switch between laser driver operation modes, to the laserdriver IC along with video signals (VDO1, /VDO1, VDO2, and /VDO2). The laser driver IC controls laser emission (ON/OFF) according to the combination ofCNTRL0, CNTRL1, and CNTRL2 signals.[2] Laser mirror 1 (loop-back mirror) Reflects a laser beam toward laser mirror 2.[3] Laser mirror 2 (loop-back mirror) Reflects a laser beam toward the photoconductor drum.[4] BD PCB Generates a BD signal.[5] Polygonal mirror Scans the photoconductive drum with a laser beam in the mainscan direction.[6] Laser unit Emits laser beams.[7] BD mirror Reflects a laser beam toward the BD PCB.Name Function[4]Image ProcessorPCBDC Controller PCBJ314J207J206 J205IC5[2] [3][1]
